Hello , sir . Can I help you ?   Yes . I ’ m looking for a winter jacket .   What size are you looking for ?   A medium is fine for me .   How about this one ?   I don ’ t like the color .   What color do you like ?   Blue .   How about that one ?   Yes . It ’ s nice . Can I try it on ?   Sure . There is a changing room behind you .   Thank you . I ’ ll be right back . 